Abstract: The invention is a method for treating onychomycosis in humans comprising contacting a fungal infected nail with a composition comprising an effective amount of a copper salt. Treating human nails with the copper salt composition can be used to detect fungal infection before physical symptoms are presented. Fungal infection is also prevented by pre-treatment of nails with the copper salt composition.

Abstract: A gate driver circuit is provided for push-pull power transistors. Inverse square wave signals are provided to each of the driver circuits for activating the power transistors. The combination of an inductor and diodes provides a delay for activating the corresponding power transistor at a positive transition of the control signal, but do not have a significant delay at the negative transition. This provides protection to prevent the power transistors from being activated concurrently while having lower power loss at high drive frequencies. The control terminal for each power transistor is connected to a voltage clamping circuit to prevent the negative transition from exceeding a predetermined limit.

Abstract: A ballast circuit is provided for the start-up and operation of gaseous discharge lamps. A power transformer connected to an inductive/capacitive tank circuit drives the lamps from its secondary windings. An oscillator circuit generates a frequency modulated square wave output signal to vary the frequency of the power supplied to the tank circuit. A photodetector feedback circuit senses the light output of the lamps and regulates the frequency of the oscillator output signal. The feedback circuit also may provide input from a remote sensor or from an external computer controller. The feedback and oscillator circuits produce a high-frequency signal for lamp start-up and a lower, variable frequency signal for operating the lamps over a range of light intensity. The tank circuit is tuned to provide a sinusoidal signal to the lamps at its lowest operating frequency, which provides the greatest power to the lamps.

Abstract: An ink jet printer for printing a print image on a moving print medium by selectively depositing ink drops at a plurality of print positions arranged in a non-uniform rectangular grid on the medium, such that a plurality of print lines are formed on the medium, includes a print head for generating a plurality of jet drop streams directed at the medium, and arranged in a row which is skewed with respect to the direction of movement of the medium. The drops in each stream are selectively charged and deflected in a direction perpendicular to the row. Each stream services a plurality of print positions and prints a band of print lines. Drops deposited along adjacent print lines by adjacent jets overlap more than drops deposited along adjacent print lines by the same jet.

Abstract: A protection circuit monitors each of one or more charge electrodes used in an ink jet printer. The voltage level on each electrode or the current flowing to each electrode is continuously monitored. A fault condition is indicated if the voltage is below a defined level or the current flow is above a defined level. Since fault conditions can be indicated during normal printer operation, the monitored status of the electrodes is keyed or sampled by gated flip-flop circuits during normally stable periods of the operating cycle of the electrodes so that only true faults are detected. If guard ink drops are inserted between successive printing ink drops to form a guard zone, the preferred sampling points are the end portions of the guard zones. Once a defective charge electrode is detected, the associated flip-flop is locked into a fault condition.